Variable-speed gearing.



` J. S. BARNES.

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PATENTED SEPT. 3, 1907.

l J..s,. BARNES. VARIABLE SPEED, GBARING.-

A PPLIUATION FILED JUNE 4, 1.907. f

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JOHN S BARNES, OF ROOKFORD, ILLINOIS, ASSIGNOR TO W. F.

OF ROGKFORD, ILLINOIS, A CORPORATION OF t' JOHN BARNES Y (JOMPA NY,

ILLINOIS.

vARIABLEsPEED GEARING.

Specification of Letters Patent.

Patented Sept. 3, 1907.

Application filed June 4,1907. Serial No. 377,260.

To all whom it may concern.'

Be it `known that I, JOHN S. BARNES, a citizen of the United States, residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in VariableSpeed Gearing, of which the following is a specification.

The object of this invention is to impart variable speeds to a driven member from a driving member.

In the accompanying drawings. Figure l is a vertical section on dotted line a a Fig. 2. Fig. 2 is an end elevation as seen from the end supporting the operating lever. Fig. 3 is a vertical transverse section on dotted line b b Fig. l. Fig. 4 is a vertical transverse section on dotted line c c Fig. l.

The operative parts of my improved variable speed gearing are located and supported within the suitable casing comprising the center l, and ends 2 and 3. The ends are connected to the inturned fianges 4 of the center section by the screws 5. The center section has an opening 6 in its top portion which is closed by the removable cover 7. The center section has a vertical partition 8, which is provided with a tubular bearing 9 extending from one face.

A tubular shaft l0 has one end supported by the tubular bearing 9, and its other end supported by the end 3. To the end of the tubular shaft projecting beyond the end 3 is fixedly connected a bevel gear ll which meshes with a bevel pinion 12 connected to the driven shaft 13. To the tubular shaft l0 are xedly connected, in this instance, five spur gears 14, l5, 16, I7, and 18 of varying diameters.

Near the end 3 of the casing is located a bearing 19 which in conjunction with` a bearing 20 formed in the vertical partition 8, and a bearing 2l'formed inI the 35 end 2 of the casing, supports a driving shaft 22, and this driving shaft supports a tight pulley 23 and a loose pulley 24. This driving' shaft is located within the tubular shaft l0, but supported independently thereof. To the driving shaft 22 is fixedly connected a spur gear 25 which is located between the vertical partition 8 and the end 2 of the casing.

On the driving shaft 22 is loosely mounted a support 26 having a handle portion 27 extending at substantially right angles thereto, and projecting through a segmental 45 opening 28 in the end 2 of the casing. This support 26 has a stud 29 extending from it, on which is loosely mounted an intermediate spur gear 30, which is in constant mesh with the spur gear 25. The hand lever 27 is provided with a thumb latch 3l which operates on a reciprocating pin 32 held in proper position by the lug 33. The outer face of the end 2 is provided with five recesses 34, 35, 36, 37 and 38 Within which the pin 32 may be seated. The segmental opening 28 has an enlargement 39 at one end, which permits the end to be placed over the hand lever 27 and thumb latch 3l.

The end 3 and vertical partition 8 support five shafts 40, 4l, 42, 43 and 44, in a manner to permit them to rotate freely. The shaft 40 has a spur gear 45 flxedly connected to it, which meshes with the spur gear 11.4 connected to the tubular shaft IO, and to this shaft is also connected a spur gear 46 which is located in `the same vertical plane with the spur gear 25. rl`he shaft 4]. has a spur gear 47 fixedly connected to it, which meshes with the spur gear l5 connected to the tubular shaft l0, and to this shaft is also connected a spur gear 48 which is located in the same vertical plane with the spur gear 25. The shaft 42 has a spur gear 49 fixedly connected to it, which :meshes with the spul' gear 16 connected to the tubular shaft l0, and to this shaft is also connected a spur gear 50 which is located in the same vertical plane with the spur gear 25. The shaft 43 has a spur gear 5l fixedly connected to it, which meshes with the spur gear 17 connected to the tubular shaft 10, and to this shaft is also connected a spur gear 52 which is located in the same vertical plane with the spur gear 25. The shaft 44 has a spur gear 53 fixedly connected to it, which meshes with the spur gear 18 connected to the tubular shaft l0, and to this shaft is also connected a spur gear 54 which is located in the same vertical plane with the spur gear 25.

As seen at Fig. 3, the intermediate spur gear 30 is in mesh with the spur gears 25 and 50, thereby forming' a driving connection between the driving shaft 22 and the driven shaft 13, through the spur gear 50, shaft 42, spur gears 16 and 49, tubular shaft l0, and bevel gears Il and l2. Should the intermediate spur gear 30 be moved into mesh with the spur gears 25and 48, a different spced will be imparted 'to the driven shaft through the shaft 4l, spur gears 47 and l5, tubular shaft l0 and bevel gears ll and l2. This intermediate spur gear can be moved to form a connection between the spur gear 25, and any one of the spur gears 46, 48, 50, 52 and 54, thereby imparting five different speeds to the driven shaft.

It will be noticed that when the tubular shaft is rotated by any one of the connections above described, all the shafts 40, 41, 42, 43 and 44 are rotating idly with the exception of the one that is doing the driving.

By means of the thumb latch 3l., the pin 32 can beV inserted in any one of the recesses 34, 35, 36, 37 and 3S, which will hold the intermediate spur gear in mesh with any one of the spur gears 46, 48, 50, 52 and 54.

The change of speed can be made while the driving shaft 22 is rotating, as the intermediate spur gear will free one of the spur gears 46, 48, 50, 52 and 54,before it engages another of said gears.

The speed change gearing can be used for various purposes, but the use or which I have especially designed it, is for imparting different speeds to a drill of a drilling machine.

I Claim as my invention.

1. In a variable speed gearing, the combination of a driving; member, and a driven member, of a plurality of spur gears fixedly connected to thedriven member, a plurality of shafts arranged equi-distant from the driven member, a spur gear iixedly connected with each shaft and meshing with one of the spur gears connected to the driven member, a spur gear on the driving member, a secondary spur gear connected to each shaft, and an intermediate spur gear in constant mesh with the spur gear on the driving member and capable of being moved into mesh with any one of the secondary spur gears of the shafts.

2. In a variable speed gearing, the combination of a driving member, and a driven member, of a plurality of spur gears fixedly connected to the driven member, a plurality of shafts arranged equi distant from the driven member, a spur gear fixedly connected with each shaft and meshing with one of the spur gears connected to the driven member, a spur gear on the driving member', a secondary spur gear Connected to each shaft, an intermediate spur gear in constant mesh with the spur gear on the driving mem ber and capable ot being moved into mesh with any one of the secondary spur gears on the shafts, and means for holding the intermediate spnr gear in mesh with any one of the secondary spur gears.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JOHN S. BARNES.

Witnesses A. O. BnHnL, E. D. E. N. Bnrmr.. 

